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SYNTHESIS OF N-ARYL SUBSTITUTED 4H-1,4-BENZOTHIAZINE 1,1-DIOXIDE 2-CARBOXYLIC ACID-ESTERS

 

作者: SimonE. Lopez,   Jaime Charris,   Neudo Urdaneta,   Gricela Lobo,  

 

期刊: Phosphorus, Sulfur, and Silicon and the Related Elements  （Taylor Available online 1998）
卷期: Volume 143, issue 1  

页码: 53-61

 

ISSN:1042-6507

 

年代: 1998

 

DOI:10.1080/10426509808045484

 

出版商: Taylor & Francis Group

 

关键词: 4H-1,4-Benzothiazine-1;1-dioxide;N-aryl-phenylsulfonylacrylates;cyclization reaction

 

数据来源: Taylor

 

摘要:

A group of N-aryl substituted 1,4-benzothiazine-1,1-dioxide-2 carboxylic acid esters is reported. This is the first example of N-aryl-derivatives of the 4H-1,4-benzothiazine nucleus; the key step is the cyclization of N-aryl-phenylsulfonyl-acrylates 4–8 using potassium carbonate in acetonitrile/18-crown-6-ether to the corresponding title compounds in moderate yields.

 

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